Akuvox EM53 is an Expansion Module for SP-R59P with large graphic LCD display, 22 programmer keys and 22 dual-color LEDs, and can be programmed to various features include BLF, BLF List, Speed Dial, Hot Desking, Record, XML Browser, Account, Call Forward, Pickup, Intercom, DTMF, ans so on with our VoIP solutions avail Now.